Problem

Solutions For An Introduction to Genetic Analysis Chapter 17 Problem 1P

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Solution 1

The table showing the chromosome constitutions in a normally diploid organism with three chromosomes is shown below:

Name

Designation

Constitution

No. of chromosomes

Euploids

Monoploid

n

A B C

3

Diploid

2n

AA BB CC

6

Triploid

3n

AAA BBB CCC

9

Tetraploid

4n

AAAA BBBB CCCC

12

Aneuploids

Monosomic

2n – 1

A BB CC

5

AA B CC

5

AA BB C

5

Trisomic

2n +1

AAA BB CC

7

AA BBB CC

7

AA BB CCC

7

Based on the above table we can characterize the following genomes:

HH II J KK:

This would be monosomic as a single chromosome of J is missing.

HH II JJ KKK:

This would be trisomic since an extra K chromosome is present. This is an aneuploid.

HHHH IIII JJJJ KKKK:

This would be tetraploid since all the four different types of chromosomes have four copies each. This is a euploid.

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